1,1,1,2-Tetrachloroethane
West Harris County Municipal Utility District 15
1,1,1,2-Tetrachloroethane is a synthetic chemical used in metal degreasing and as an intermediate in industrial chemical production.
12
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 2 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 1 ppb
The EWG Health Guideline of 1 ppb for 1,1,1,2-tetrachloroethane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-05 | AE16632 | ND |
| 2018-03-05 | AE16636 | ND |
| 2019-01-28 | AE51688 | ND |
| 2019-04-23 | AE63390 | ND |
| 2020-01-13 | AE93133 | ND |
| 2020-11-05 | AF33470 | ND |
| 2021-03-09 | AF46042 | ND |
| 2021-04-27 | AF51428 | ND |
| 2022-03-01 | AF86930 | ND |
| 2022-03-01 | AF86950 | ND |
| 2023-02-22 | AG29960 | ND |
| 2023-02-22 | AG29962 | ND |